A card with Phyrexian mana symbols in its mana cost is each color that appears in that mana cost, regardless of how that cost may have been paid.

6/1/2011

To calculate the converted mana cost of a card with Phyrexian mana symbols in its cost, count each Phyrexian mana symbol as 1.

6/1/2011

As you cast a spell or activate an activated ability with one or more Phyrexian mana symbols in its cost, you choose how to pay for each Phyrexian mana symbol at the same time you would choose modes or choose a value for X.

6/1/2011

If you’re at 1 life or less, you can’t pay 2 life.

6/1/2011

Phyrexian mana is not a new color. Players can’t add Phyrexian mana to their mana pools.

6/1/2011

Act of Aggression can target any creature an opponent controls, even one that’s untapped.

6/1/2011

Gaining control of a creature doesn’t cause you to gain control of any Auras or Equipment attached to it.